Some takes From Benedict Evans that are worth considering: https://twitter.com/benedictevans/status/1320378054150148098... “Meanwhile: the NYU app has access to friend data in your feed and friend data is also in the ads it scrapes. And it replaces an actual security model with our trust that NYU are nice people and won't abuse this access. That is exactly how Cambridge Analytica happened.”
So there is no way for NYU to not have access to friend data if they want access to ad data.